(57) It is an object of the present invention to provide a grinding method of a multifunction
grinding machine having no need to exchange one end portion to the other end portion
of a workpiece and having a more simple construction to grind both of one and the
other end portions.
The grinding method of the multifunction grinding machine includes the steps of a
step holding a workpiece W by a pair of centering members 21, 31 of a pair of spindle
equipments, a step shifting two centering members 21, 31 to one side of a spindle
rotational axis ZW, a step facing a grinding wheel TB at the other side to the other
end portion WTb of the workpiece W, a step grinding the other end portion WTb of the
workpiece W by the grinding wheel TB at the other side by rotating a driving pin 23
of the spindle equipment at one side, a step retracting the grinding wheel at other
side and stopping the rotation of the driving pin 23 at one side and also shifting
two centering members 21, 31 to the other side of the spindle rotational axis ZW,
a step facing a grinding wheel TA at one side to one end portion WTa of the workpiece
W, and a step grinding one end portion WTa of the workpiece W by the grinding wheel
TA at one side by rotating a driving pin 33 of the spindle equipment at the other
side.
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